| Arrangement for mixing fibre components, especially in spinning preparation, fiber web production or the like -> Monitor Keywords |
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  Arrangement for mixing fibre components, especially in spinning preparation, fiber web production or the likeRelated Patent Categories: Agitating, With WeighingThe Patent Description & Claims data below is from USPTO Patent Application 20060067161. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCE TO RELATED APPLICATION [0001] This application claims priority from German Patent Application No. 10 2004 048 222.5 dated Sep. 30, 2004, the entire disclosure of which is incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] The invention relates to an arrangement for mixing fibre components, for example fibre flocks, especially in spinning preparation, fibre web production or the like. [0003] Flock-mixing systems are used for the production of accurate and intensive mixing for spinning and the non-woven industry. The materials mixed are: different synthetic fibres, cotton and synthetic fibres, different recovered waste fibres, cotton and recovered waste fibres. For the spinning of blend yarns of synthetic fibres and carded cotton, in modern spinning works the components are generally mixed in flocks on flock-mixing systems. Such a process results in more intensive mixing. [0004] In a known method, the fibre material to be supplied is conveyable into at least two weighing containers and, when weighing is complete, the fibre material is dischargeable from the at least two weighing containers onto a mixing belt, the weighing containers being arranged one after the other--seen in the direction of travel of the belt--above the mixing belt. [0005] In high-production weighing hopper-feeders, in practice the weighing container, which is generally arranged centrally above the mixing belt, forms a cone of material which, when several machines are arranged one after the other, very quickly results in large accumulations of fibre. At the same time, disadvantageously, there may occur defective weighings caused by incompletely emptied weighing containers and material densities that are too high in the centre, resulting in disruptions in the transport of the material and in the opening at the downstream mixer rollers. [0006] It is an aim of the invention to provide an arrangement of the kind described at the beginning which avoids or mitigates the mentioned disadvantages and which makes it possible in a simple way to achieve accurate weighing, troublefree production and increased throughput. SUMMARY OF THE INVENTION [0007] The invention provides a fibre mixing system comprising: [0008] a travelling mixing belt; and [0009] at least two weighing containers, arranged one after the other in a direction of travel of the belt, for delivering weighed fibre material onto the belt; wherein the position of at least one of said weighing containers in a transverse direction relative to the direction of travel of the belt can be adjusted. [0010] The measures taken according to the invention can bring about more uniform deposition or arrangement of the fibre material on the mixing belt. The distribution of the fibre material on the mixing belt can thereby be optimised and the throughput of the weighing hopper-feeder system can be substantially increased. [0011] Advantageously, the position of at least one weighing container can be adjusted in the direction of the transverse extent of the mixing belt. Advantageously, the position of each weighing container can be adjusted. Advantageously, the position of the weighing container(s) can be adjusted in dependence upon one or more parameters selected from the group consisting of the mixing ratio of the fibre contents; the proportions of the fibre components; the mass of the fibre components; and the number of weighing containers. [0012] Advantageously, the at least two weighing containers are movable relative to the mixing belt. Advantageously, the mixing belt is in a fixed position. Advantageously, the at least two weighing containers can be moved, preferably linearly, back and forth above the mixing belt. Advantageously, the at least two weighing containers are displaceable parallel to the mixing belt. Advantageously, for displacing each of the at least two weighing containers, each weighing container is associated with at least one linear drive and/or at least one parallel guide. Where present, the parallel guide may have two guide means (linear guides) coupled to one another to run synchronously. Advantageously, the guide means are associated with side walls of the weighing container that are located opposite one another. Advantageously, the guide means are coupled to one another by a synchronisation shaft. Advantageously, the guide means comprise at least one spindle drive. Advantageously, the guide means comprise at least one pressure cylinder. The pressure cylinder may be, for example, a pneumatic cylinder or a hydraulic cylinder. Advantageously, the pressure cylinder is a three-position cylinder. The guide means may each have a traction mechanism, for example, a chain or a toothed belt, which advantageously circulates around two guide rollers, wheels (for example, sprocket or toothed belt wheels) or the like. [0013] Advantageously, the displacing device is associated with at least one drive device. A manual drive device, for example, a crank wheel or the like, may be present. Advantageously, at least one motor drive device, for example, an electric motor, is present. The drive device may be, for example, a geared motor or a stepping motor. Advantageously, stepless adjustment of the position of the weighing container(s) is provided. Advantageously, actual value feedback from the at least one drive device is provided. The actual value feedback may be a cam plate or the like having an inductive proximity switch. Advantageously, the at least one drive device is connected to an electronic controlling and regulating device, for example, a microcomputer. Advantageously, each weighing device is associated with a position-measuring element (actual value), which is preferably connected to the controlling and regulating device. Advantageously, a desired value memory is connected to the controlling and regulating device. Advantageously, the proportion by weight of each fibre component can be input into the controlling and regulating device. Advantageously, the controlling and regulating device is able to calculate the position of the weighing containers from the proportions by weight of the fibre components and the number of weighing devices. Advantageously, the controlling and regulating device is able to output electrical signals to the drive devices, for example, electric motors, for setting the position of the weighing container(s). [0014] Advantageously, each weighing container is associated with at least one weighing cell or the like, and the weighing container can be displaced together with the at least one weighing cell or the like. Advantageously, on altering the mixing ratio of the fibre components, the position of the weighing containers can be adjusted. Advantageously, a selectable off-centre position of the at least one weighing container is provided. Advantageously, the mixing belt is associated with at least two weighing bale openers. Advantageously, the mixing belt is associated with at least two pneumatically fed weighing feeders. [0015] The invention also provides an arrangement for mixing fibre components, for example, fibre flocks, especially in spinning preparation, fibre web production or the like, in which the fibre material to be supplied is conveyable into at least two weighing containers and, when weighing is complete, the fibre material is dischargeable from the at least two weighing containers onto a mixing belt, the weighing containers being arranged one after the other--seen in the direction of travel of the belt--above the mixing belt, characterised in that the position of at least one weighing container transverse to the longitudinal extent of the mixing belt can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS [0016] FIG. 1 is a diagrammatic view of a fibre-mixing system having four weighing feeders, a mixing belt and an opener roller, [0017] FIG. 2 is a side view of a weighing bale opener with a weighing container above the mixing belt, [0018] FIG. 3a shows the weighing container in a first position above the mixing belt, [0019] FIG. 3b shows the weighing container in a second position above the mixing belt, [0020] FIG. 4 is a side view in section I-I according to FIG. 1 with two weighing containers in different positions, [0021] FIG. 5 shows a first embodiment of the displacement device for the weighing container having a mechanical displacing device, [0022] FIG. 6 shows a second embodiment of the displacement device for the weighing container having a pneumatic displacing device, Continue reading... Full patent description for Arrangement for mixing fibre components, especially in spinning preparation, fiber web production or the like Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Arrangement for mixing fibre components, especially in spinning preparation, fiber web production or the like patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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